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Updated: May 25, 2026

Writing Bragg Gratings in Multicore Fibers
Published on: April 20, 2016
Selective mode excitation and discrimination of four-core homogeneous coupled multi-core fiber
Yasuo Kokubun1, Toshinori Komo, Katsuhiro Takenaga
1Graduate School of Eng., Yokohama National University, 79-5 Tokiwadai, Yokohama, 240-8501, Japan. ykokubun@ynu.ac.jp
Abstract:
Coupled modes of homogeneous coupled multi-core fiber are selectively excited and discriminated utilizing the difference of equivalent propagation angle. To quantatively evaluate the extinction ratio (selectivity) of adjacent modes, a new mode discrimination technique is developed by measuring the visibility of far-field patterns under small change of wavelength of the launching beam. The peak angles of discriminated far-field patterns show a strong correlation with the incident angle of the launching beam, which means that the coupled modes were selectively excited and discriminated.
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